(function() {
    var m = Math
      , mround = function(r) {
        return r >> 0
    }
      , vendor = (/webkit/i).test(navigator.appVersion) ? "webkit" : (/firefox/i).test(navigator.userAgent) ? "Moz" : "opera"in window ? "O" : ""
      , isAndroid = (/android/gi).test(navigator.appVersion)
      , isIDevice = (/iphone|ipad/gi).test(navigator.appVersion)
      , isPlaybook = (/playbook/gi).test(navigator.appVersion)
      , isTouchPad = (/hp-tablet/gi).test(navigator.appVersion)
      , has3d = "WebKitCSSMatrix"in window && "m11"in new WebKitCSSMatrix()
      , hasTouch = "ontouchstart"in window && !isTouchPad
      , hasTransform = vendor + "Transform"in document.documentElement.style
      , hasTransitionEnd = isIDevice || isPlaybook
      , nextFrame = (function() {
        return window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(callback) {
            return setTimeout(callback, 1)
        }
    })()
      , cancelFrame = (function() {
                return window.cancelRequestAnimationFrame || window.cancelAnimationFrame || window.webkitCancelRequestAnimationFrame || window.mozCancelRequestAnimationFrame || window.oCancelRequestAnimationFrame || window.msCancelRequestAnimationFrame || clearTimeout

        // return window.cancelRequestAnimationFrame || window.webkitCancelAnimationFrame || window.webkitCancelRequestAnimationFrame || window.mozCancelRequestAnimationFrame || window.oCancelRequestAnimationFrame || window.msCancelRequestAnimationFrame || clearTimeout
    })()
      , RESIZE_EV = "onorientationchange"in window ? "orientationchange" : "resize"
      , START_EV = hasTouch ? "touchstart" : "mousedown"
      , MOVE_EV = hasTouch ? "touchmove" : "mousemove"
      , END_EV = hasTouch ? "touchend" : "mouseup"
      , CANCEL_EV = hasTouch ? "touchcancel" : "mouseup"
      , WHEEL_EV = vendor == "Moz" ? "DOMMouseScroll" : "mousewheel"
      , trnOpen = "translate" + (has3d ? "3d(" : "(")
      , trnClose = has3d ? ",0)" : ")"
      , iScroll = function(el, options) {
        var that = this, doc = document, i;
        that.wrapper = typeof el == "object" ? el : doc.getElementById(el);
        that.wrapper.style.overflow = "hidden";
        that.scroller = that.wrapper.children[0];
        that.options = {
            hScroll: true,
            vScroll: true,
            x: 0,
            y: 0,
            bounce: true,
            bounceLock: false,
            momentum: true,
            lockDirection: true,
            useTransform: true,
            useTransition: false,
            topOffset: 0,
            checkDOMChanges: false,
            hScrollbar: true,
            vScrollbar: true,
            fixedScrollbar: isAndroid,
            hideScrollbar: isIDevice,
            fadeScrollbar: isIDevice && has3d,
            scrollbarClass: "",
            zoom: false,
            zoomMin: 1,
            zoomMax: 4,
            doubleTapZoom: 2,
            wheelAction: "scroll",
            snap: false,
            snapThreshold: 1,
            onRefresh: null,
            onBeforeScrollStart: function(e) {
                e.preventDefault()
            },
            onScrollStart: null,
            onBeforeScrollMove: null,
            onScrollMove: null,
            onBeforeScrollEnd: null,
            onScrollEnd: null,
            onTouchEnd: null,
            onDestroy: null,
            onZoomStart: null,
            onZoom: null,
            onZoomEnd: null
        };
        for (i in options) {
            that.options[i] = options[i]
        }
        that.x = that.options.x;
        that.y = that.options.y;
        that.options.useTransform = hasTransform ? that.options.useTransform : false;
        that.options.hScrollbar = that.options.hScroll && that.options.hScrollbar;
        that.options.vScrollbar = that.options.vScroll && that.options.vScrollbar;
        that.options.zoom = that.options.useTransform && that.options.zoom;
        that.options.useTransition = hasTransitionEnd && that.options.useTransition;
        if (that.options.zoom && isAndroid) {
            trnOpen = "translate(";
            trnClose = ")"
        }
        that.scroller.style[vendor + "TransitionProperty"] = that.options.useTransform ? "-" + vendor.toLowerCase() + "-transform" : "top left";
        that.scroller.style[vendor + "TransitionDuration"] = "0";
        that.scroller.style[vendor + "TransformOrigin"] = "0 0";
        if (that.options.useTransition) {
            that.scroller.style[vendor + "TransitionTimingFunction"] = "cubic-bezier(0.33,0.66,0.66,1)"
        }
        if (that.options.useTransform) {
            that.scroller.style[vendor + "Transform"] = trnOpen + that.x + "px," + that.y + "px" + trnClose
        } else {
            that.scroller.style.cssText += ";position:absolute;top:" + that.y + "px;left:" + that.x + "px"
        }
        if (that.options.useTransition) {
            that.options.fixedScrollbar = true
        }
        that.refresh();
        that._bind(RESIZE_EV, window);
        that._bind(START_EV);
        if (!hasTouch) {
            that._bind("mouseout", that.wrapper);
            if (that.options.wheelAction != "none") {
                that._bind(WHEEL_EV)
            }
        }
        if (that.options.checkDOMChanges) {
            that.checkDOMTime = setInterval(function() {
                that._checkDOMChanges()
            }, 500)
        }
    };
    iScroll.prototype = {
        enabled: true,
        x: 0,
        y: 0,
        steps: [],
        scale: 1,
        currPageX: 0,
        currPageY: 0,
        pagesX: [],
        pagesY: [],
        aniTime: null,
        wheelZoomCount: 0,
        handleEvent: function(e) {
            var that = this;
            switch (e.type) {
            case START_EV:
                if (!hasTouch && e.button !== 0) {
                    return
                }
                that._start(e);
                break;
            case MOVE_EV:
                that._move(e);
                break;
            case END_EV:
            case CANCEL_EV:
                that._end(e);
                break;
            case RESIZE_EV:
                that._resize();
                break;
            case WHEEL_EV:
                that._wheel(e);
                break;
            case "mouseout":
                that._mouseout(e);
                break;
            case "webkitTransitionEnd":
                that._transitionEnd(e);
                break
            }
        },
        _checkDOMChanges: function() {
            if (this.moved || this.zoomed || this.animating || (this.scrollerW == this.scroller.offsetWidth * this.scale && this.scrollerH == this.scroller.offsetHeight * this.scale)) {
                return
            }
            this.refresh()
        },
        _scrollbar: function(dir) {
            var that = this, doc = document, bar;
            if (!that[dir + "Scrollbar"]) {
                if (that[dir + "ScrollbarWrapper"]) {
                    if (hasTransform) {
                        that[dir + "ScrollbarIndicator"].style[vendor + "Transform"] = ""
                    }
                    that[dir + "ScrollbarWrapper"].parentNode.removeChild(that[dir + "ScrollbarWrapper"]);
                    that[dir + "ScrollbarWrapper"] = null;
                    that[dir + "ScrollbarIndicator"] = null
                }
                return
            }
            if (!that[dir + "ScrollbarWrapper"]) {
                bar = doc.createElement("div");
                if (that.options.scrollbarClass) {
                    bar.className = that.options.scrollbarClass + dir.toUpperCase()
                } else {
                    bar.style.cssText = "position:absolute;z-index:100;" + (dir == "h" ? "height:7px;bottom:1px;left:2px;right:" + (that.vScrollbar ? "7" : "2") + "px" : "width:7px;bottom:" + (that.hScrollbar ? "7" : "2") + "px;top:2px;right:1px")
                }
                bar.style.cssText += ";pointer-events:none;-" + vendor + "-transition-property:opacity;-" + vendor + "-transition-duration:" + (that.options.fadeScrollbar ? "350ms" : "0") + ";overflow:hidden;opacity:" + (that.options.hideScrollbar ? "0" : "1");
                that.wrapper.appendChild(bar);
                that[dir + "ScrollbarWrapper"] = bar;
                bar = doc.createElement("div");
                if (!that.options.scrollbarClass) {
                    bar.style.cssText = "position:absolute;z-index:100;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);-" + vendor + "-background-clip:padding-box;-" + vendor + "-box-sizing:border-box;" + (dir == "h" ? "height:100%" : "width:100%") + ";-" + vendor + "-border-radius:3px;border-radius:3px"
                }
                bar.style.cssText += ";pointer-events:none;-" + vendor + "-transition-property:-" + vendor + "-transform;-" + vendor + "-transition-timing-function:cubic-bezier(0.33,0.66,0.66,1);-" + vendor + "-transition-duration:0;-" + vendor + "-transform:" + trnOpen + "0,0" + trnClose;
                if (that.options.useTransition) {
                    bar.style.cssText += ";-" + vendor + "-transition-timing-function:cubic-bezier(0.33,0.66,0.66,1)"
                }
                that[dir + "ScrollbarWrapper"].appendChild(bar);
                that[dir + "ScrollbarIndicator"] = bar
            }
            if (dir == "h") {
                that.hScrollbarSize = that.hScrollbarWrapper.clientWidth;
                that.hScrollbarIndicatorSize = m.max(mround(that.hScrollbarSize * that.hScrollbarSize / that.scrollerW), 8);
                that.hScrollbarIndicator.style.width = that.hScrollbarIndicatorSize + "px";
                that.hScrollbarMaxScroll = that.hScrollbarSize - that.hScrollbarIndicatorSize;
                that.hScrollbarProp = that.hScrollbarMaxScroll / that.maxScrollX
            } else {
                that.vScrollbarSize = that.vScrollbarWrapper.clientHeight;
                that.vScrollbarIndicatorSize = m.max(mround(that.vScrollbarSize * that.vScrollbarSize / that.scrollerH), 8);
                that.vScrollbarIndicator.style.height = that.vScrollbarIndicatorSize + "px";
                that.vScrollbarMaxScroll = that.vScrollbarSize - that.vScrollbarIndicatorSize;
                that.vScrollbarProp = that.vScrollbarMaxScroll / that.maxScrollY
            }
            that._scrollbarPos(dir, true)
        },
        _resize: function() {
            var that = this;
            setTimeout(function() {
                that.refresh()
            }, isAndroid ? 200 : 0)
        },
        _pos: function(x, y) {
            x = this.hScroll ? x : 0;
            y = this.vScroll ? y : 0;
            if (this.options.useTransform) {
                this.scroller.style[vendor + "Transform"] = trnOpen + x + "px," + y + "px" + trnClose + " scale(" + this.scale + ")"
            } else {
                x = mround(x);
                y = mround(y);
                this.scroller.style.left = x + "px";
                this.scroller.style.top = y + "px"
            }
            this.x = x;
            this.y = y;
            this._scrollbarPos("h");
            this._scrollbarPos("v")
        },
        _scrollbarPos: function(dir, hidden) {
            var that = this, pos = dir == "h" ? that.x : that.y, size;
            if (!that[dir + "Scrollbar"]) {
                return
            }
            pos = that[dir + "ScrollbarProp"] * pos;
            if (pos < 0) {
                if (!that.options.fixedScrollbar) {
                    size = that[dir + "ScrollbarIndicatorSize"] + mround(pos * 3);
                    if (size < 8) {
                        size = 8
                    }
                    that[dir + "ScrollbarIndicator"].style[dir == "h" ? "width" : "height"] = size + "px"
                }
                pos = 0
            } else {
                if (pos > that[dir + "ScrollbarMaxScroll"]) {
                    if (!that.options.fixedScrollbar) {
                        size = that[dir + "ScrollbarIndicatorSize"] - mround((pos - that[dir + "ScrollbarMaxScroll"]) * 3);
                        if (size < 8) {
                            size = 8
                        }
                        that[dir + "ScrollbarIndicator"].style[dir == "h" ? "width" : "height"] = size + "px";
                        pos = that[dir + "ScrollbarMaxScroll"] + (that[dir + "ScrollbarIndicatorSize"] - size)
                    } else {
                        pos = that[dir + "ScrollbarMaxScroll"]
                    }
                }
            }
            that[dir + "ScrollbarWrapper"].style[vendor + "TransitionDelay"] = "0";
            that[dir + "ScrollbarWrapper"].style.opacity = hidden && that.options.hideScrollbar ? "0" : "1";
            that[dir + "ScrollbarIndicator"].style[vendor + "Transform"] = trnOpen + (dir == "h" ? pos + "px,0" : "0," + pos + "px") + trnClose
        },
        _start: function(e) {
            var that = this, point = hasTouch ? e.touches[0] : e, matrix, x, y, c1, c2;
            if (!that.enabled) {
                return
            }
            if (that.options.onBeforeScrollStart) {
                that.options.onBeforeScrollStart.call(that, e)
            }
            if (that.options.useTransition || that.options.zoom) {
                that._transitionTime(0)
            }
            that.moved = false;
            that.animating = false;
            that.zoomed = false;
            that.distX = 0;
            that.distY = 0;
            that.absDistX = 0;
            that.absDistY = 0;
            that.dirX = 0;
            that.dirY = 0;
            if (that.options.zoom && hasTouch && e.touches.length > 1) {
                c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX);
                c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY);
                that.touchesDistStart = m.sqrt(c1 * c1 + c2 * c2);
                that.originX = m.abs(e.touches[0].pageX + e.touches[1].pageX - that.wrapperOffsetLeft * 2) / 2 - that.x;
                that.originY = m.abs(e.touches[0].pageY + e.touches[1].pageY - that.wrapperOffsetTop * 2) / 2 - that.y;
                if (that.options.onZoomStart) {
                    that.options.onZoomStart.call(that, e)
                }
            }
            if (that.options.momentum) {
                if (that.options.useTransform) {
                    matrix = getComputedStyle(that.scroller, null)[vendor + "Transform"].replace(/[^0-9-.,]/g, "").split(",");
                    x = matrix[4] * 1;
                    y = matrix[5] * 1
                } else {
                    x = getComputedStyle(that.scroller, null).left.replace(/[^0-9-]/g, "") * 1;
                    y = getComputedStyle(that.scroller, null).top.replace(/[^0-9-]/g, "") * 1
                }
                if (x != that.x || y != that.y) {
                    if (that.options.useTransition) {
                        that._unbind("webkitTransitionEnd")
                    } else {
                        cancelFrame(that.aniTime)
                    }
                    that.steps = [];
                    that._pos(x, y)
                }
            }
            that.absStartX = that.x;
            that.absStartY = that.y;
            that.startX = that.x;
            that.startY = that.y;
            that.pointX = point.pageX;
            that.pointY = point.pageY;
            that.startTime = e.timeStamp || Date.now();
            if (that.options.onScrollStart) {
                that.options.onScrollStart.call(that, e)
            }
            that._bind(MOVE_EV);
            that._bind(END_EV);
            that._bind(CANCEL_EV)
        },
        _move: function(e) {
            var that = this, point = hasTouch ? e.touches[0] : e, deltaX = point.pageX - that.pointX, deltaY = point.pageY - that.pointY, newX = that.x + deltaX, newY = that.y + deltaY, c1, c2, scale, timestamp = e.timeStamp || Date.now();
            if (that.options.onBeforeScrollMove) {
                that.options.onBeforeScrollMove.call(that, e)
            }
            if (that.options.zoom && hasTouch && e.touches.length > 1) {
                c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX);
                c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY);
                that.touchesDist = m.sqrt(c1 * c1 + c2 * c2);
                that.zoomed = true;
                scale = 1 / that.touchesDistStart * that.touchesDist * this.scale;
                if (scale < that.options.zoomMin) {
                    scale = 0.5 * that.options.zoomMin * Math.pow(2, scale / that.options.zoomMin)
                } else {
                    if (scale > that.options.zoomMax) {
                        scale = 2 * that.options.zoomMax * Math.pow(0.5, that.options.zoomMax / scale)
                    }
                }
                that.lastScale = scale / this.scale;
                newX = this.originX - this.originX * that.lastScale + this.x,
                newY = this.originY - this.originY * that.lastScale + this.y;
                this.scroller.style[vendor + "Transform"] = trnOpen + newX + "px," + newY + "px" + trnClose + " scale(" + scale + ")";
                if (that.options.onZoom) {
                    that.options.onZoom.call(that, e)
                }
                return
            }
            that.pointX = point.pageX;
            that.pointY = point.pageY;
            if (newX > 0 || newX < that.maxScrollX) {
                newX = that.options.bounce ? that.x + (deltaX / 2) : newX >= 0 || that.maxScrollX >= 0 ? 0 : that.maxScrollX
            }
            if (newY > that.minScrollY || newY < that.maxScrollY) {
                newY = that.options.bounce ? that.y + (deltaY / 2) : newY >= that.minScrollY || that.maxScrollY >= 0 ? that.minScrollY : that.maxScrollY
            }
            if (that.absDistX < 6 && that.absDistY < 6) {
                that.distX += deltaX;
                that.distY += deltaY;
                that.absDistX = m.abs(that.distX);
                that.absDistY = m.abs(that.distY);
                return
            }
            if (that.options.lockDirection) {
                if (that.absDistX > that.absDistY + 5) {
                    newY = that.y;
                    deltaY = 0
                } else {
                    if (that.absDistY > that.absDistX + 5) {
                        newX = that.x;
                        deltaX = 0
                    }
                }
            }
            that.moved = true;
            that._pos(newX, newY);
            that.dirX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
            that.dirY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;
            if (timestamp - that.startTime > 300) {
                that.startTime = timestamp;
                that.startX = that.x;
                that.startY = that.y
            }
            if (that.options.onScrollMove) {
                that.options.onScrollMove.call(that, e)
            }
        },
        _end: function(e) {
            if (hasTouch && e.touches.length != 0) {
                return
            }
            var that = this, point = hasTouch ? e.changedTouches[0] : e, target, ev, momentumX = {
                dist: 0,
                time: 0
            }, momentumY = {
                dist: 0,
                time: 0
            }, duration = (e.timeStamp || Date.now()) - that.startTime, newPosX = that.x, newPosY = that.y, distX, distY, newDuration, snap, scale;
            that._unbind(MOVE_EV);
            that._unbind(END_EV);
            that._unbind(CANCEL_EV);
            if (that.options.onBeforeScrollEnd) {
                that.options.onBeforeScrollEnd.call(that, e)
            }
            if (that.zoomed) {
                scale = that.scale * that.lastScale;
                scale = Math.max(that.options.zoomMin, scale);
                scale = Math.min(that.options.zoomMax, scale);
                that.lastScale = scale / that.scale;
                that.scale = scale;
                that.x = that.originX - that.originX * that.lastScale + that.x;
                that.y = that.originY - that.originY * that.lastScale + that.y;
                that.scroller.style[vendor + "TransitionDuration"] = "200ms";
                that.scroller.style[vendor + "Transform"] = trnOpen + that.x + "px," + that.y + "px" + trnClose + " scale(" + that.scale + ")";
                that.zoomed = false;
                that.refresh();
                if (that.options.onZoomEnd) {
                    that.options.onZoomEnd.call(that, e)
                }
                return
            }
            if (!that.moved) {
                if (hasTouch) {
                    if (that.doubleTapTimer && that.options.zoom) {
                        clearTimeout(that.doubleTapTimer);
                        that.doubleTapTimer = null;
                        if (that.options.onZoomStart) {
                            that.options.onZoomStart.call(that, e)
                        }
                        that.zoom(that.pointX, that.pointY, that.scale == 1 ? that.options.doubleTapZoom : 1);
                        if (that.options.onZoomEnd) {
                            setTimeout(function() {
                                that.options.onZoomEnd.call(that, e)
                            }, 200)
                        }
                    } else {
                        that.doubleTapTimer = setTimeout(function() {
                            that.doubleTapTimer = null;
                            target = point.target;
                            while (target.nodeType != 1) {
                                target = target.parentNode
                            }
                            if (target.tagName != "SELECT" && target.tagName != "INPUT" && target.tagName != "TEXTAREA") {
                                ev = document.createEvent("MouseEvents");
                                ev.initMouseEvent("click", true, true, e.view, 1, point.screenX, point.screenY, point.clientX, point.clientY, e.ctrlKey, e.altKey, e.shiftKey, e.metaKey, 0, null);
                                ev._fake = true;
                                target.dispatchEvent(ev)
                            }
                        }, that.options.zoom ? 250 : 0)
                    }
                }
                that._resetPos(200);
                if (that.options.onTouchEnd) {
                    that.options.onTouchEnd.call(that, e)
                }
                return
            }
            if (duration < 300 && that.options.momentum) {
                momentumX = newPosX ? that._momentum(newPosX - that.startX, duration, -that.x, that.scrollerW - that.wrapperW + that.x, that.options.bounce ? that.wrapperW : 0) : momentumX;
                momentumY = newPosY ? that._momentum(newPosY - that.startY, duration, -that.y, (that.maxScrollY < 0 ? that.scrollerH - that.wrapperH + that.y - that.minScrollY : 0), that.options.bounce ? that.wrapperH : 0) : momentumY;
                newPosX = that.x + momentumX.dist;
                newPosY = that.y + momentumY.dist;
                if ((that.x > 0 && newPosX > 0) || (that.x < that.maxScrollX && newPosX < that.maxScrollX)) {
                    momentumX = {
                        dist: 0,
                        time: 0
                    }
                }
                if ((that.y > that.minScrollY && newPosY > that.minScrollY) || (that.y < that.maxScrollY && newPosY < that.maxScrollY)) {
                    momentumY = {
                        dist: 0,
                        time: 0
                    }
                }
            }
            if (momentumX.dist || momentumY.dist) {
                newDuration = m.max(m.max(momentumX.time, momentumY.time), 10);
                if (that.options.snap) {
                    distX = newPosX - that.absStartX;
                    distY = newPosY - that.absStartY;
                    if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) {
                        that.scrollTo(that.absStartX, that.absStartY, 200)
                    } else {
                        snap = that._snap(newPosX, newPosY);
                        newPosX = snap.x;
                        newPosY = snap.y;
                        newDuration = m.max(snap.time, newDuration)
                    }
                }
                that.scrollTo(mround(newPosX), mround(newPosY), newDuration);
                if (that.options.onTouchEnd) {
                    that.options.onTouchEnd.call(that, e)
                }
                return
            }
            if (that.options.snap) {
                distX = newPosX - that.absStartX;
                distY = newPosY - that.absStartY;
                if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) {
                    that.scrollTo(that.absStartX, that.absStartY, 200)
                } else {
                    snap = that._snap(that.x, that.y);
                    if (snap.x != that.x || snap.y != that.y) {
                        that.scrollTo(snap.x, snap.y, snap.time)
                    }
                }
                if (that.options.onTouchEnd) {
                    that.options.onTouchEnd.call(that, e)
                }
                return
            }
            that._resetPos(200);
            if (that.options.onTouchEnd) {
                that.options.onTouchEnd.call(that, e)
            }
        },
        _resetPos: function(time) {
            var that = this
              , resetX = that.x >= 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x
              , resetY = that.y >= that.minScrollY || that.maxScrollY > 0 ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY : that.y;
            if (resetX == that.x && resetY == that.y) {
                if (that.moved) {
                    that.moved = false;
                    if (that.options.onScrollEnd) {
                        that.options.onScrollEnd.call(that)
                    }
                }
                if (that.hScrollbar && that.options.hideScrollbar) {
                    if (vendor == "webkit") {
                        that.hScrollbarWrapper.style[vendor + "TransitionDelay"] = "300ms"
                    }
                    that.hScrollbarWrapper.style.opacity = "0"
                }
                if (that.vScrollbar && that.options.hideScrollbar) {
                    if (vendor == "webkit") {
                        that.vScrollbarWrapper.style[vendor + "TransitionDelay"] = "300ms"
                    }
                    that.vScrollbarWrapper.style.opacity = "0"
                }
                return
            }
            that.scrollTo(resetX, resetY, time || 0)
        },
        _wheel: function(e) {
            var that = this, wheelDeltaX, wheelDeltaY, deltaX, deltaY, deltaScale;
            if ("wheelDeltaX"in e) {
                wheelDeltaX = e.wheelDeltaX / 12;
                wheelDeltaY = e.wheelDeltaY / 12
            } else {
                if ("detail"in e) {
                    wheelDeltaX = wheelDeltaY = -e.detail * 3
                } else {
                    wheelDeltaX = wheelDeltaY = -e.wheelDelta
                }
            }
            if (that.options.wheelAction == "zoom") {
                deltaScale = that.scale * Math.pow(2, 1 / 3 * (wheelDeltaY ? wheelDeltaY / Math.abs(wheelDeltaY) : 0));
                if (deltaScale < that.options.zoomMin) {
                    deltaScale = that.options.zoomMin
                }
                if (deltaScale > that.options.zoomMax) {
                    deltaScale = that.options.zoomMax
                }
                if (deltaScale != that.scale) {
                    if (!that.wheelZoomCount && that.options.onZoomStart) {
                        that.options.onZoomStart.call(that, e)
                    }
                    that.wheelZoomCount++;
                    that.zoom(e.pageX, e.pageY, deltaScale, 400);
                    setTimeout(function() {
                        that.wheelZoomCount--;
                        if (!that.wheelZoomCount && that.options.onZoomEnd) {
                            that.options.onZoomEnd.call(that, e)
                        }
                    }, 400)
                }
                return
            }
            deltaX = that.x + wheelDeltaX;
            deltaY = that.y + wheelDeltaY;
            if (deltaX > 0) {
                deltaX = 0
            } else {
                if (deltaX < that.maxScrollX) {
                    deltaX = that.maxScrollX
                }
            }
            if (deltaY > that.minScrollY) {
                deltaY = that.minScrollY
            } else {
                if (deltaY < that.maxScrollY) {
                    deltaY = that.maxScrollY
                }
            }
            that.scrollTo(deltaX, deltaY, 0)
        },
        _mouseout: function(e) {
            var t = e.relatedTarget;
            if (!t) {
                this._end(e);
                return
            }
            while (t = t.parentNode) {
                if (t == this.wrapper) {
                    return
                }
            }
            this._end(e)
        },
        _transitionEnd: function(e) {
            var that = this;
            if (e.target != that.scroller) {
                return
            }
            that._unbind("webkitTransitionEnd");
            that._startAni()
        },
        _startAni: function() {
            var that = this, startX = that.x, startY = that.y, startTime = Date.now(), step, easeOut, animate;
            if (that.animating) {
                return
            }
            if (!that.steps.length) {
                that._resetPos(400);
                return
            }
            step = that.steps.shift();
            if (step.x == startX && step.y == startY) {
                step.time = 0
            }
            that.animating = true;
            that.moved = true;
            if (that.options.useTransition) {
                that._transitionTime(step.time);
                that._pos(step.x, step.y);
                that.animating = false;
                if (step.time) {
                    that._bind("webkitTransitionEnd")
                } else {
                    that._resetPos(0)
                }
                return
            }
            animate = function() {
                var now = Date.now(), newX, newY;
                if (now >= startTime + step.time) {
                    that._pos(step.x, step.y);
                    that.animating = false;
                    if (that.options.onAnimationEnd) {
                        that.options.onAnimationEnd.call(that)
                    }
                    that._startAni();
                    return
                }
                now = (now - startTime) / step.time - 1;
                easeOut = m.sqrt(1 - now * now);
                newX = (step.x - startX) * easeOut + startX;
                newY = (step.y - startY) * easeOut + startY;
                that._pos(newX, newY);
                if (that.animating) {
                    that.aniTime = nextFrame(animate)
                }
            }
            ;
            animate()
        },
        _transitionTime: function(time) {
            time += "ms";
            this.scroller.style[vendor + "TransitionDuration"] = time;
            if (this.hScrollbar) {
                this.hScrollbarIndicator.style[vendor + "TransitionDuration"] = time
            }
            if (this.vScrollbar) {
                this.vScrollbarIndicator.style[vendor + "TransitionDuration"] = time
            }
        },
        _momentum: function(dist, time, maxDistUpper, maxDistLower, size) {
            var deceleration = 0.0006
              , speed = m.abs(dist) / time
              , newDist = (speed * speed) / (2 * deceleration)
              , newTime = 0
              , outsideDist = 0;
            if (dist > 0 && newDist > maxDistUpper) {
                outsideDist = size / (6 / (newDist / speed * deceleration));
                maxDistUpper = maxDistUpper + outsideDist;
                speed = speed * maxDistUpper / newDist;
                newDist = maxDistUpper
            } else {
                if (dist < 0 && newDist > maxDistLower) {
                    outsideDist = size / (6 / (newDist / speed * deceleration));
                    maxDistLower = maxDistLower + outsideDist;
                    speed = speed * maxDistLower / newDist;
                    newDist = maxDistLower
                }
            }
            newDist = newDist * (dist < 0 ? -1 : 1);
            newTime = speed / deceleration;
            return {
                dist: newDist,
                time: mround(newTime)
            }
        },
        _offset: function(el) {
            var left = -el.offsetLeft
              , top = -el.offsetTop;
            while (el = el.offsetParent) {
                left -= el.offsetLeft;
                top -= el.offsetTop
            }
            if (el != this.wrapper) {
                left *= this.scale;
                top *= this.scale
            }
            return {
                left: left,
                top: top
            }
        },
        _snap: function(x, y) {
            var that = this, i, l, page, time, sizeX, sizeY;
            page = that.pagesX.length - 1;
            for (i = 0,
            l = that.pagesX.length; i < l; i++) {
                if (x >= that.pagesX[i]) {
                    page = i;
                    break
                }
            }
            if (page == that.currPageX && page > 0 && that.dirX < 0) {
                page--
            }
            x = that.pagesX[page];
            sizeX = m.abs(x - that.pagesX[that.currPageX]);
            sizeX = sizeX ? m.abs(that.x - x) / sizeX * 500 : 0;
            that.currPageX = page;
            page = that.pagesY.length - 1;
            for (i = 0; i < page; i++) {
                if (y >= that.pagesY[i]) {
                    page = i;
                    break
                }
            }
            if (page == that.currPageY && page > 0 && that.dirY < 0) {
                page--
            }
            y = that.pagesY[page];
            sizeY = m.abs(y - that.pagesY[that.currPageY]);
            sizeY = sizeY ? m.abs(that.y - y) / sizeY * 500 : 0;
            that.currPageY = page;
            time = mround(m.max(sizeX, sizeY)) || 200;
            return {
                x: x,
                y: y,
                time: time
            }
        },
        _bind: function(type, el, bubble) {
            (el || this.scroller).addEventListener(type, this, !!bubble)
        },
        _unbind: function(type, el, bubble) {
            (el || this.scroller).removeEventListener(type, this, !!bubble)
        },
        destroy: function() {
            var that = this;
            that.scroller.style[vendor + "Transform"] = "";
            that.hScrollbar = false;
            that.vScrollbar = false;
            that._scrollbar("h");
            that._scrollbar("v");
            that._unbind(RESIZE_EV, window);
            that._unbind(START_EV);
            that._unbind(MOVE_EV);
            that._unbind(END_EV);
            that._unbind(CANCEL_EV);
            if (!that.options.hasTouch) {
                that._unbind("mouseout", that.wrapper);
                that._unbind(WHEEL_EV)
            }
            if (that.options.useTransition) {
                that._unbind("webkitTransitionEnd")
            }
            if (that.options.checkDOMChanges) {
                clearInterval(that.checkDOMTime)
            }
            if (that.options.onDestroy) {
                that.options.onDestroy.call(that)
            }
        },
        refresh: function() {
            var that = this, offset, i, l, els, pos = 0, page = 0;
            if (that.scale < that.options.zoomMin) {
                that.scale = that.options.zoomMin
            }
            that.wrapperW = that.wrapper.clientWidth || 1;
            that.wrapperH = that.wrapper.clientHeight || 1;
            that.minScrollY = -that.options.topOffset || 0;
            that.scrollerW = mround(that.scroller.offsetWidth * that.scale);
            that.scrollerH = mround((that.scroller.offsetHeight + that.minScrollY) * that.scale);
            that.maxScrollX = that.wrapperW - that.scrollerW;
            that.maxScrollY = that.wrapperH - that.scrollerH + that.minScrollY;
            that.dirX = 0;
            that.dirY = 0;
            if (that.options.onRefresh) {
                that.options.onRefresh.call(that)
            }
            that.hScroll = that.options.hScroll && that.maxScrollX < 0;
            that.vScroll = that.options.vScroll && (!that.options.bounceLock && !that.hScroll || that.scrollerH > that.wrapperH);
            that.hScrollbar = that.hScroll && that.options.hScrollbar;
            that.vScrollbar = that.vScroll && that.options.vScrollbar && that.scrollerH > that.wrapperH;
            offset = that._offset(that.wrapper);
            that.wrapperOffsetLeft = -offset.left;
            that.wrapperOffsetTop = -offset.top;
            if (typeof that.options.snap == "string") {
                that.pagesX = [];
                that.pagesY = [];
                els = that.scroller.querySelectorAll(that.options.snap);
                for (i = 0,
                l = els.length; i < l; i++) {
                    pos = that._offset(els[i]);
                    pos.left += that.wrapperOffsetLeft;
                    pos.top += that.wrapperOffsetTop;
                    that.pagesX[i] = pos.left < that.maxScrollX ? that.maxScrollX : pos.left * that.scale;
                    that.pagesY[i] = pos.top < that.maxScrollY ? that.maxScrollY : pos.top * that.scale
                }
            } else {
                if (that.options.snap) {
                    that.pagesX = [];
                    while (pos >= that.maxScrollX) {
                        that.pagesX[page] = pos;
                        pos = pos - that.wrapperW;
                        page++
                    }
                    if (that.maxScrollX % that.wrapperW) {
                        that.pagesX[that.pagesX.length] = that.maxScrollX - that.pagesX[that.pagesX.length - 1] + that.pagesX[that.pagesX.length - 1]
                    }
                    pos = 0;
                    page = 0;
                    that.pagesY = [];
                    while (pos >= that.maxScrollY) {
                        that.pagesY[page] = pos;
                        pos = pos - that.wrapperH;
                        page++
                    }
                    if (that.maxScrollY % that.wrapperH) {
                        that.pagesY[that.pagesY.length] = that.maxScrollY - that.pagesY[that.pagesY.length - 1] + that.pagesY[that.pagesY.length - 1]
                    }
                }
            }
            that._scrollbar("h");
            that._scrollbar("v");
            if (!that.zoomed) {
                that.scroller.style[vendor + "TransitionDuration"] = "0";
                that._resetPos(200)
            }
        },
        scrollTo: function(x, y, time, relative) {
            var that = this, step = x, i, l;
            that.stop();
            if (!step.length) {
                step = [{
                    x: x,
                    y: y,
                    time: time,
                    relative: relative
                }]
            }
            for (i = 0,
            l = step.length; i < l; i++) {
                if (step[i].relative) {
                    step[i].x = that.x - step[i].x;
                    step[i].y = that.y - step[i].y
                }
                that.steps.push({
                    x: step[i].x,
                    y: step[i].y,
                    time: step[i].time || 0
                })
            }
            that._startAni()
        },
        scrollToElement: function(el, time) {
            var that = this, pos;
            el = el.nodeType ? el : that.scroller.querySelector(el);
            if (!el) {
                return
            }
            pos = that._offset(el);
            pos.left += that.wrapperOffsetLeft;
            pos.top += that.wrapperOffsetTop;
            pos.left = pos.left > 0 ? 0 : pos.left < that.maxScrollX ? that.maxScrollX : pos.left;
            pos.top = pos.top > that.minScrollY ? that.minScrollY : pos.top < that.maxScrollY ? that.maxScrollY : pos.top;
            time = time === undefined ? m.max(m.abs(pos.left) * 2, m.abs(pos.top) * 2) : time;
            that.scrollTo(pos.left, pos.top, time)
        },
        scrollToPage: function(pageX, pageY, time) {
            var that = this, x, y;
            time = time === undefined ? 400 : time;
            if (that.options.onScrollStart) {
                that.options.onScrollStart.call(that)
            }
            if (that.options.snap) {
                pageX = pageX == "next" ? that.currPageX + 1 : pageX == "prev" ? that.currPageX - 1 : pageX;
                pageY = pageY == "next" ? that.currPageY + 1 : pageY == "prev" ? that.currPageY - 1 : pageY;
                pageX = pageX < 0 ? 0 : pageX > that.pagesX.length - 1 ? that.pagesX.length - 1 : pageX;
                pageY = pageY < 0 ? 0 : pageY > that.pagesY.length - 1 ? that.pagesY.length - 1 : pageY;
                that.currPageX = pageX;
                that.currPageY = pageY;
                x = that.pagesX[pageX];
                y = that.pagesY[pageY]
            } else {
                x = -that.wrapperW * pageX;
                y = -that.wrapperH * pageY;
                if (x < that.maxScrollX) {
                    x = that.maxScrollX
                }
                if (y < that.maxScrollY) {
                    y = that.maxScrollY
                }
            }
            that.scrollTo(x, y, time)
        },
        disable: function() {
            this.stop();
            this._resetPos(0);
            this.enabled = false;
            this._unbind(MOVE_EV);
            this._unbind(END_EV);
            this._unbind(CANCEL_EV)
        },
        enable: function() {
            this.enabled = true
        },
        stop: function() {
            if (this.options.useTransition) {
                this._unbind("webkitTransitionEnd")
            } else {
                cancelFrame(this.aniTime)
            }
            this.steps = [];
            this.moved = false;
            this.animating = false
        },
        zoom: function(x, y, scale, time) {
            var that = this
              , relScale = scale / that.scale;
            if (!that.options.useTransform) {
                return
            }
            that.zoomed = true;
            time = time === undefined ? 200 : time;
            x = x - that.wrapperOffsetLeft - that.x;
            y = y - that.wrapperOffsetTop - that.y;
            that.x = x - x * relScale + that.x;
            that.y = y - y * relScale + that.y;
            that.scale = scale;
            that.refresh();
            that.x = that.x > 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x;
            that.y = that.y > that.minScrollY ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY : that.y;
            that.scroller.style[vendor + "TransitionDuration"] = time + "ms";
            that.scroller.style[vendor + "Transform"] = trnOpen + that.x + "px," + that.y + "px" + trnClose + " scale(" + scale + ")";
            that.zoomed = false
        },
        isReady: function() {
            return !this.moved && !this.zoomed && !this.animating
        }
    };
    if (typeof exports !== "undefined") {
        exports.iScroll = iScroll
    } else {
        window.iScroll = iScroll
    }
})();
